A soft floating rope purse seine fishing device based on offshore wind farm

Abstract

The present invention provides a soft floating rope type purse seine fishing device based on an offshore wind farm, comprising a core purse seine area, and two layers of inner and outer purse seines arranged along the outer edge of the core purse seine area, the inner and outer layers of the purse seines being respectively an inner purse seine and an outer purse seine, wherein a plurality of wind power poles are stationed in the core purse seine area, and there is a spacing between the inner and outer layers of the purse seine, thereby forming an anti-escape buffer zone away from the wind power poles between the inner and outer layers of the purse seine, and both the inner and outer layers of the purse seine are soft floating rope type purse seines. The engineering construction scheme using the above device is suitable for a large range of soft seabed purse seines, and the construction is flexible and simple, with relatively low investment, fixed piles are driven into the bottom of the seabed fixed purse seine, there are no pipe piles in the sea and on the sea surface, there is little impact on the marine environment, and it is easy to restore the original state of the ocean; the soft floating rope type purse seine moves with the tide and the waves, and has good anti-typhoon and wind and wave effects.

Description

Technical Field

[0001] The invention relates to a purse seine fishing device, in particular to a soft floating rope purse seine fishing device based on an offshore wind farm. Background Art

[0002] The ocean is the "blue granary" for humans to obtain high-quality protein. Due to environmental changes and overfishing, the shortage and decline of fishery resources worldwide have become a serious global problem. In the past 40 years, my country's marine fisheries, with a focus on marine aquaculture, have developed rapidly, setting off five industrial waves of seaweed, marine shrimp, marine shellfish, marine fish, and marine treasures. The total aquaculture output has been ranked first in the world since 1990. The problems of environmental deterioration in local waters, declining product quality, and serious aquaculture diseases are becoming more and more serious. The traditional model of marine aquaculture has been difficult to adapt to the requirements of my country's healthy economic and social development and the current status of the marine ecological environment. Following the traditional fishing and aquaculture industries, my country's marine fisheries are facing a new round of industrial upgrading, making full use of the proliferation of fisheries with natural productivity in the waters, promoting the transformation and upgrading of aquaculture, building marine ranches, protecting and rationally developing marine fishery resources, and developing the marine fishery economy. The project is guided by market demand, optimizing product structure, fine-tuning quality structure, and improving industrial structure, and promoting the supply of fishery products from mainly meeting the demand for "quantity" to paying more attention to the demand for "quality".

[0003] In the process of marine resource enhancement and release, it is generally recognized that the combination of simple enhancement and release and management will be more effective in resource restoration. Resource conservation and ecological restoration is a systematic project, and enhancement and release is only one of the measures. The effect of aquatic biological resource enhancement and release in isolation is very limited. However, the actual situation is that enhancement and release are easy, but post-release management is difficult. With the continuous expansion of the scale of enhancement and release, and the increasing social attention and public awareness of ecological protection, it is inevitable that fishery authorities at all levels will be required to focus more on the management and conservation of fishery resources.

[0004] Generally, coastal shallow-water enclosure farming models use pole enclosure farming, double-circumference large-span pipe pile enclosure farming, and open-type stainless steel barrier sea enclosure farming, but they are either too costly or not suitable for large-scale animal husbandry and fishing, especially for large-scale animal husbandry and fishing areas with muddy bottoms and shallow water depths of about 2-10m. Summary of the invention

[0005] The invention provides a soft floating rope purse seine fishing device based on an offshore wind power foundation, which has the advantages of flexible construction, low investment cost and is suitable for large-scale soft seabed purse seines.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a soft floating rope purse seine fishing device based on an offshore wind farm, comprising a core purse seine area, inner and outer layers of purse seines arranged along the outer edge of the core purse seine area, the inner and outer layers of purse seines are respectively an inner purse seine and an outer purse seine, a plurality of wind power poles are stationed in the core purse seine area, a spacing is provided between the inner and outer layers of purse seine, thereby forming an escape-proof buffer zone away from the wind power poles between the inner and outer layers of purse seine, the inner and outer layers of purse seine both adopt soft floating rope purse seine, the soft floating rope purse seine comprises an upper net with a plurality of floats, a lower net connected to the bottom of the upper net, and a sinker connected in series to the bottom of the lower net. A bottom iron chain, multiple fixed piles driven into the depth of the seabed, and a pulling rope connected between the fixed piles and the bottom iron chain. A buoy connected to the upper line rope of the net floats to the surface. The upper net and lower net installed in pieces are respectively connected to the adjacent upper net and lower net on the left and right to form a large soft net that can float with the water flow in the water. The lower net with the bottom iron chain is partially exposed to the seabed. The upper and lower lines of the net composed of the upper net and the lower net are fixed by a climbing rope triangle, that is, bottom piles are respectively arranged before and after the bottom iron chain, and an upper climbing rope and a lower climbing rope are fixed to each bottom pile. The other end of the upper climbing rope is fixed to the float line that has floated to the surface, and the other end of the lower climbing rope is fixed to the bottom iron chain line.

[0007] As an improvement, the lower part of the upper net garment is flexibly connected with the upper part of the lower net garment by threading a rope.

[0008] As an improvement: the upper net garment and the lower net garment are both installed in pieces.

[0009] As an improvement: a seaweed cultivation area for Sargassum fusiformis is also set up on the outer circle of the outer fence.

[0010] As an improvement: the upper net and the lower net are both made of diamond mesh nets made of ultra-high molecular weight polyethylene fibers, and the sinking piles and fixed piles are both bamboo piles.

[0011] The soft floating rope type purse seine fishing device of the present invention is based on the offshore wind power foundation. The main inner and outer perimeter net projects all adopt the unit-dispersed and independently detachable purse seine method. Each unit is composed of an upper floating rope type buoy with a certain height of upper net (suitable for sea areas with a water depth of less than 12m at the highest tidal level), a lower bamboo pile with a bottom iron chain fixing the lower net with a height, and each section of the buoy and the bottom iron chain are fixed with 4 climbing ropes up and down and front and back. The engineering construction plan using the above device is suitable for a large range of soft seabed purse seines. The construction is flexible and simple, with relatively low investment. The fixed piles are driven into the bottom of the seabed to fix the bottom of the purse seine. There are no pipe piles in the sea and on the sea surface, which has little impact on the marine environment and is easy to restore to its original state. The soft floating rope type purse seine moves with the tide and waves, and has good anti-typhoon and wind and wave effects. The upper and lower left and right segmented purse seines can not only facilitate the construction of super-large purse seine projects, but also facilitate the daily maintenance and repair of the mesh. The lower net is designed to be basically unmaintained, and it is difficult to repair. The lower net is 0.6m below the seabed with a bottom iron chain, and the part exposed from the mud bottom is 0.4m high, so it is generally not easy to be damaged. The upper net is 12m high and is all in the sea water. It is the main body of the purse seine. Hard debris in the sea water or other reasons may cause the net to be damaged. If the net is found to be damaged during daily inspections, the upper, lower, left and right nets are all connected by ropes. The upper, lower, left and right nets are separated, and the damaged nets are replaced and repaired. The purse seine can be easily disassembled, repaired and installed, which is a key technology to effectively ensure the safety of animal husbandry and fishery production without large-scale escape accidents.

[0012] The present invention is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of a soft floating rope purse seine fishing device based on an offshore wind farm according to the present invention.

[0014] Figure 2 yes Figure 1 Schematic diagram of the front structure of the inner and outer soft floating rope purse seine.

[0015] Figure 3 yes Figure 1 Schematic diagram of the side structure of the inner and outer soft floating rope purse seine. DETAILED DESCRIPTION

[0016] like Figure 1 , Figure 2 , Figure 3As shown, the present invention is a soft floating rope fence fishing device based on an offshore wind farm, comprising a core fishing area A, and inner and outer layers of fences arranged along the outer edge of the core fishing area, the inner and outer layers of fences being an inner layer fence B and an outer layer fence C respectively, a plurality of wind power poles 1 are stationed in the core fishing area A, and there is a gap between the inner layer fence B and the outer layer fence C, so as to form an escape-proof buffer zone D away from the wind power poles between the inner layer fence and the outer layer fence, and both the inner layer fence and the outer layer fence are soft floating rope fences, that is, both are dispersed and independently detachable fences with 10m as a unit. Each unit of soft floating rope purse seine includes an upper floating rope buoy connected to a 12m high net 3 (suitable for sea areas with a water depth of less than 12m at the highest tidal level), a 1m high lower net 4 connected to the bottom of the net 3, a bottom-sinking iron chain 5 connected to the bottom of the lower net 4, a plurality of fixed piles 6 driven deep into the seabed, and a pull rope 7 connected between the fixed piles 6 and the bottom-sinking iron chain 5. The buoy 2 connected to the upper line rope of the net 3 floats to the surface. The upper net 3 and the lower net 4 installed in pieces are connected to the adjacent upper net 3 and the lower net 4 on the left and right sides respectively, so as to form a large soft net that can float with the water flow in the water. The lower net 4 with the bottom iron chain 5 at the bottom is partially exposed to the seabed. The upper and lower lines of the net composed of the upper net 3 and the lower net 4 are fixed by a climbing rope triangle, that is, the bottom piles 8 are respectively set before and after the bottom iron chain 5. Each bottom pile 8 is fixed with an upper climbing rope 9 and a lower climbing rope 10. The other end of the upper climbing rope 9 is fixed on the floating buoy line that floats on the water surface, and the other end of the lower climbing rope is fixed on the bottom iron chain line. For the anti-collision protection area of ​​the enclosure net, it has both the functions of seawater purification and ecological restoration. In this embodiment, a seaweed planting area E is also set on the outer circle of the outer enclosure net.

[0017] The upper net 3 and the lower net 4 are both installed in pieces. Each piece of the upper net 3 is 10m long and 12m high; each piece of the lower net 4 is 10m long and 1m high. Both the upper net and the lower net are ultra-high molecular weight polyethylene fiber nets, 8cm diamond mesh, and the mesh wire specification is 90 strands. The upper net 3 and the lower net 4 are first installed in pieces, and the left and right meshes are connected to each other to form an ultra-large fence. The sinking piles and fixed piles are both bamboo piles. The bamboo piles are 4m long and 0.18m in diameter. Each string of sinking iron chains is 10m long and weighs 100 jin. A pps material cylindrical buoy is used as a float (diameter 0.26m, length 0.24m).

[0018] Construction and installation of lower net and mooring system: Each 10m long lower net is equipped with 4 bamboo piles, and a string of bottom-sinking iron chains is connected to a lower net. The bamboo piles are driven into the seabed 4-8m deep, and nylon pull ropes are tied to the bamboo piles, together with the bottom-sinking iron chains and the lower net to a depth of 0.6m below the seabed mud. The lower net is 0.6m below the seabed mud and 0.4m is exposed from the seabed.

[0019] Structure and installation of the upper fishing net and floating rope frame system: Each 10-meter-long upper fishing net is equipped with 10 floats. The floats are connected to the upper gillnet rope of the upper fishing net, and the floats bring the gillnet rope of the upper fishing net to the water surface. The lower part of the upper fishing net 3 is connected to the upper part of the lower fishing net 4 by threading ropes. The structures of the upper fishing net 3 and the lower fishing net 4 are as Figure 2 shown.

[0020] Structure and installation of the fixing climbing rope system for the upper and lower gillnets of the fishing net are as Figure 3 shown: One bamboo pile for the fixing pile 6 is driven in front and behind in the direction 30 meters away from the bottom chain, and one climbing rope is tied to the fixing pile 6 bamboo pile to connect the float line; the lower climbing rope is tied to connect the bottom chain line. Each fishing net has 2 fixing piles 6 bamboo piles, and a total of 4 climbing ropes are pulled up and down, front and back to fix the float line and the bottom chain line. The main fishing net in seawater is soft and fluttering with the water flow.

[0021] The use of upper, lower, left, and right segmented purse seines can not only facilitate the construction of super-large purse seine projects but also facilitate the daily maintenance and repair of the net sheets. The design of the lower fishing net in this scheme is basically not repaired and maintained. Its repair is difficult, and the lower fishing net with a bottom chain reaches 0.6 meters below the seabed, and the part exposed above the sea mud bottom is 0.4 meters high, and it is generally not easily damaged. The lower fishing net is 12 meters high and is all in seawater. It is the main body of the purse seine. Hard debris or other various reasons in seawater may equally cause the net sheet to be damaged. If it is found that the upper net sheet is damaged during daily inspections, due to the upper, lower, left, and right net sheets being connected by threading ropes, the damaged net sheet can be replaced and repaired by using the method of separating the upper, lower, left, and right net sheets. The convenience of disassembling, repairing, and installing the purse seine net sheet is the key technology to effectively ensure the safety of fishing production without large-scale escape accidents.

[0022] Sargassum fusiforme seaweed fields are built within approximately 35 meters around the perimeter of the outer net, serving as a collision protection area for the purse seine, and also having the functions of seawater purification and ecological restoration. There is a 15-meter pile rope buffer zone and a 20-meter Sargassum fusiforme soft floating rope aquaculture area. The floating ropes are laid according to the water flow direction of high and low tides. The soft floating ropes are arranged in a "pin" shape on the sea. Taking 500m × 20m as a breeding cell, the cell spacing is maintained at 25m - 40m.

[0023] The main materials required for the shallow sea floating rope cultivation of Sargassum fusiforme are as follows.

[0024] Piles: Made of wood or bamboo, the length depends on the sea area conditions and is 4 meters.

[0025] Floating ropes: Polyethylene chemical fiber material ropes, with a diameter of 1.5 cm - 2 cm.

[0026] Pile ropes: The material specifications are the same as those of the floating ropes, and the length is 3 - 4 times the water depth of the aquaculture sea area.

[0027] Floats: Made of plastic foam, the plastic foam floats have a diameter of 28 cm - 30 cm.

[0028] Rope for tying float: polyethylene rope, diameter 0.2cm~0.3cm.

[0029] Lifting rope: polyethylene rope, diameter 0.3cm~0.8cm.

[0030] Seedling rope: The seedling rope is made of polyethylene rope with 360 threads (3 strands × 120 threads) to 600 threads (3 strands × 200 threads).

[0031] The plastic foam float is connected to the floating rope, and the float provides buoyancy for the cable. The floating rope floats on the sea surface through the buoyancy of the float. The length of the floating rope is 500m. The length of the seedling rope is 3m and it is hung on it. The peg cable and the peg are used for fixing. One end of the peg cable is connected to the floating rope, and the other end is tied to the peg on the seabed. The layout of the floating rope is uniformly planned and reasonably laid out, taking into account flow, safety, and easy operation.

[0032] Although the present invention has been disclosed as above in terms of specific embodiments, they are not intended to limit the present invention. Any technician in this field may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the attached claims.

Claims

1. A soft floating rope purse seine fishing device based on an offshore wind farm, comprising a core purse seine area, and two layers of inner and outer purse seines arranged along the outer edge of the core purse seine area, wherein the inner and outer purse seines are respectively an inner purse seine and an outer purse seine, and characterized in that: A plurality of wind power poles are stationed in the core grazing and fishing area, and a spacing is provided between the inner and outer layers of the fence, thereby forming an escape-proof buffer zone away from the wind power poles. Both the inner and outer layers of the fence adopt soft floating rope fences, and the soft floating rope fences include an upper net with a plurality of floats, a lower net connected to the bottom of the upper net, a bottom-sinking iron chain connected in series to the bottom of the lower net, a plurality of fixed piles driven into the depth of the seabed, and a pull rope connected between the fixed piles and the bottom-sinking iron chain, which is connected to the upper line rope of the upper net. The buoy floats on the water surface, and the upper and lower nets installed in pieces are respectively connected to the adjacent upper and lower nets on the left and right sides to form a large soft net that can float with the water flow in the water. The lower net with a bottom-sinking iron chain at the bottom is partially exposed to the seabed. The upper and lower lines of the net composed of the upper and lower nets are fixed by a climbing rope triangle, that is, sinking piles are respectively arranged in front and behind the bottom-sinking iron chain, and an upper climbing rope and a lower climbing rope are fixed on each bottom pile. The other end of the upper climbing rope is fixed to the floating buoy line that has floated on the water surface, and the other end of the lower climbing rope is fixed to the bottom-sinking iron chain line; The lower part of the upper net is flexibly connected with the upper part of the lower net through ropes. The upper net and the lower net are installed in pieces. A seaweed planting area is also arranged on the outer circle of the outer fence.

2. According to claim 1, a soft floating rope purse seine fishing device based on an offshore wind farm is characterized in that: The upper net and the lower net are both made of diamond mesh nets made of ultra-high molecular weight polyethylene fibers, and the bottom piles and the fixed piles are both bamboo piles.

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